Assassin's Creed: Brotherhood Walkthrough & Strategy Guide

Make your way to the next memory start marker. You'll hear whispering and you need to find a source. A blue icon on your mini-map gives you an idea of where the voice is coming from. Investigate the cardboard box (cardboard!?) on the ground, next to a building, to trigger a cut scene.

Per Leonardo's request, sit down on the bench. Provided you have the cash, you can buy one of Leo's inventions and get the upgrade instantly. What you choose to buy is your business. Make a choice to end the mission.